Salt and ice crystallization resistance of lime-zeolite mortars

Salt and ice crystallization resistance of lime-zeolite mortars

Paper in proceedings (conference paper)

Lime mortars with partial replacement of lime by fine natural zeolite were first characterized in detail and then subjected to freeze-thaw cycles as well as to three different salt. Use of natural zeolite as pozzolanic admixture has led to a improvement in the frost resistance of lime mortars. Despite the decreasing porosity of the samples with increasing zeolite content, zeolitic mortars showed better ability to salt accumulation. The concentration of the monitored anions in the lime-zeolite mortars after treatment with saline solutions increased more than 100 times. The use of natural zeolite-modified lime mortars for desalination of chloride-contaminated masonry seems to be particularly suitable. From a comprehensive point of view, 40% replacement of lime with zeolite appears to be the most effective. It is possible to deliberate the use of these mortars for the repair of historical mortars in desalination of masonry as sacrificial renders, especially.

Lime mortars with partial replacement of lime by fine natural zeolite were first characterized in detail and then subjected to freeze-thaw cycles as well as to three different salt. Use of natural zeolite as pozzolanic admixture has led to a improvement in the frost resistance of lime mortars. Despite the decreasing porosity of the samples with increasing zeolite content, zeolitic mortars showed better ability to salt accumulation. The concentration of the monitored anions in the lime-zeolite mortars after treatment with saline solutions increased more than 100 times. The use of natural zeolite-modified lime mortars for desalination of chloride-contaminated masonry seems to be particularly suitable. From a comprehensive point of view, 40% replacement of lime with zeolite appears to be the most effective. It is possible to deliberate the use of these mortars for the repair of historical mortars in desalination of masonry as sacrificial renders, especially.

lime mortar; pozzolanic additive; zeolite; salt crystallization resistance; frost resistance; porosity;

lime mortar; pozzolanic additive; zeolite; salt crystallization resistance; frost resistance; porosity;

VYŠVAŘIL, M.; ŽIŽLAVSKÝ, T.; BAYER, P.

2024

18.08.2023

AIP Publishing

978-0-7354-4514-7

Special Concrete and Composites 2021

0094-243X

AIP conference proceedings

1

2780

United States of America

8

https://pubs.aip.org/aip/acp/article/2780/1/020005/2907185